README.rdoc in attached-0.5.9 vs README.rdoc in attached-0.6.0

@@ -4,10 +4,11 @@
 
 == Requirements
 
 The gem is tested with:
 
+* Ruby on Rails 4.0.0.rc
 * Ruby on Rails 3.1.9
 * Ruby on Rails 3.2.10
 * Ruby (MRI) 2.0.0
 * Ruby (MRI) 1.9.3
 * Ruby (MRI) 1.9.2
@@ -157,18 +158,23 @@
   rake attached:process[Audio,file]
   
 === Aliases
 
   # app/initializer/attached.rb
-  Attached::Attachment.options[:alias] = https://storage.ksylvest.com/
+  Attached::Attachment.options[:alias] = "https://storage.ksylvest.com/"
 
   # app/initializer/attached.rb
   Attached::Attachment.options[:aliases] = %w(
     https://a.storage.ksylvest.com/
     https://b.storage.ksylvest.com/
     https://c.storage.ksylvest.com/
     https://d.storage.ksylvest.com/
   )
+
+=== Metadata
+
+  # app/initializers/attached.rb
+  Attached::Attachment.options[:metadata] = { 'Cache-Control' => 'max-age=3153600' }
 
 == Status
 
 {<img src="https://travis-ci.org/ksylvest/attached.png" />}[https://travis-ci.org/ksylvest/attached]
 {<img src="https://codeclimate.com/github/ksylvest/attached.png" />}[https://codeclimate.com/github/ksylvest/attached]